Plate-lifting device



Sept. 1930. E H. A. w. wcjon Q ,7

PLATE LIFTING DEVICE Original Filed Feb. 10, 1925 $288225;- J14. W836Wood Patented Sept. 2, 193G HENRY A. WISE Woon, on NE YORK,

CHINERY CORPORATION, OF NEW'YQB K, n. Y., VA oonPoRA'r-ron or VIRG NIPLATE-marine 'niaivrcn Application file d iebruary 10, eaaserialxno.3,213,; Renewed-February 5, 1930.

This invention relates to a device for lifting a plate on aprinting-plate cylinder so as to free it from the cylinder sired toremove it On along run the-printing that in order to removethemtheymustbe beaten with a wrench ora piece of iron', so

, thatthey can be'loosened so as to'be easily lifted from the cylinder.They are cylindrical in shape and thus hug around the, cylinder. Thisbeating operation consumes time and labor often when the time especiallyis valuable.

, This invention is designed for the purpose of mechanically freely aplate, particularly the inner one and lifting it slightly from thecylinder so thatit can be taken off without resistance. At the same timethe outer plate so is freed by being slid along the cylinder at the end,both functions being performed together and automatically by the devicefor unclamping the. plates and also being per formed substantiallyinstantaneously. v x v Reference is to be had to'the accompanyingdrawings, in which p Fig. 1 is a plan of a portion of a plate cylindershowing the center cl1p with ts operating means; v 1 Fig.2 is asectional View through the center of Fig. 1 taken radially ofthecylinder and showing the plates clamped in position,-

that is, in running condition; i

Fig. 3 is a similar'view showing the operation for freeing the plates;and i 1 i 1 Fig. 4 is a sectional-viewon the line 44 of Fig.1. p

1 have shown the invention'asapplied to a plate cylinder 10 arrangedwith acenter ring 9 in fixed posit-ion forholding the adja-',

cent edges of two so-calledinsideplatesP and with a center clip ll-forholdingthe op-- posite end of'one of these plates P and also thecorresponding outside plate P The stationary center ring extends abouteled on both edges to hold the entire. inner 'edge of each ofthe-'two-plates- F but the center clip has a short length and 1s beveledin like manner'to holdthe opposite edge of when it is de plates onapress cylinder often become seated so firmly 4 halfway around thecylinder-.10 andisbew" n. Y.,: ssIeNon To YWOODHNEWSPA-PER 3 the plate Pand'the adjacent edge ofithe plate P at a single point. Preferably threep I of these center clips 11' are employed for a semi-cylindricalplate.It is the. middle one of thethreethatis illustrated and this is the onlyvonewhich hastheplate lifting device upon it. The others ably butoperated simultaneously with the middle oneshown; v W Y t I 7 It will beunderstood, of' coursetthat means is provided for clamping .the platesby mov ing the center" clips 11 forward to the left into the-positionshown in Fig. 2, and also it will; be understood that this clampingmeans comprises some'kind of a clip for clamping the outer, end ofltheoutside plate P, but, that operating means fortherod 37 whichfactu atesthe center clip 11. l i 7 Around the half circumference ofthe cyleach'ofthem screws .into a center clip as in are made plain preferinder theremay be three of these rods 87 and.

is notfa'part of theinyention, neither is the I dicated sov that theeffective length of the rods can be adjusted. That is allthere is to, t

the 'cente'r-clips is shown with additional featur'es which constitutethe plate lifting means.

This center clip isfprovided with azstud 44 I on which is pivotedfaliftervtoe 45 which in turn is pivoted-at 46 to the upper end of a l nk47." This link ispivoted at 48 in station to thecylinder 10 by screws 50or the like.

ary position. to aostationary bracket. 49-fixed I Assuming the parts tobe located in posi tion as shown in Fig. 2 and a run to have, been made,a pull on the left ofthe rodB'Z draws back the plate P from .theposition shown in Fig. 2 to that shown in Fig. 3, thusloosening'thisplatefrom anyvadh'esion' to the 1 Obviously that-has noeffect what,

butas the clipis drawn 1 back from the position shownin Fig. 2- it willnecessitatethe rising, ofthe lifter toe cylinder. ever on the'plate P 45as indicated in .Fig. 3, 'andthe consequent liftingv ofthat-end of theplate P asshown in Fig. 3. ,VVith three center clips 11 around mechanismon the side clips. Y

the half ofthe cylinder and a lifter toe 45 it 'In this manner the innerplate is free to be lifted by the lifter toe and rests on it. There isno necessity of pounding on it to free it from its hub against thecylinder. The outer plate is freed also by being slid along thecylinder. Both actions are performed automatically by the operation ofunclamping the plates. .The manner in which the rod 37 is reciprocatedis not a part of this invention and is not shown therein. v

jItwill be understood that on the opposite operation for the clamping oftheplate, the

plate is put in position up against the center 7 ring 9 and rested onthe lifter toe 4:5 as shown in Fig. 3. I 1

It will be noticed that in Fig. 2 there is a clearance between this toeand this plate. This is sufficient to allow the toe to lay the platedownon the-cylinder in advance of the coming offthe clip 11 to clampingposition so that when it doescome to that position the plate willalready-belocated properly to receive it. Thus inputting the plates in;po-

sition the operatives have no more careful and accurate work to do thanunder present conditions. Of course'the outer plates can be lifted bysimilar mechanism properly placed.

Although I have illustrated and described' only a single form of theinvention I am aware of the fact thatmodifications can be made thereinby any person skilled in the art without departingfrom the scope, of thein vention as expressed inthe claims. Therefore, I do not wish to belimited to all the .idetailsof construction herein shown and de scribed,or to the particular type of cylinder or plate, but what I (101 claim isI 1. The combination with a printing press cylinderadapted. to receiveboth inside and outside plates, ofma movable clip, for engaging andholding the adjacent edges of an si'deand outside plate, and meansconnected withsaid clip for lifting the said adjacent edge 'of theinside plate when the clip is drawn back to unclamp the plate.

i ,2. The'combination with a printing press cylinder adapted torecelveboth inside and outsideplates, of amovable clip forengaging the adjacentedges of'an inside and outsldeplate, and means connected with said I 7clip for lifting the said adjacent edge of the inside plate andsimultaneously drawing back j} the outside plate to freethat plate also.

3. In a device ofthe character described, the combination w th a fixedcenter ring for holding the edge of an inside plate, a center clip forholding the outer edge of said plate and the inner edge of'the outsideplate, said center clip-being movable to free the edge of the insideplate and to carry the outside plate outwardly with it along thecylinder, and

means operated by the withdrawal of said center clip for liftingtheadjacent edge of the inside plate to free itfrom the cylinder.

4. In a plate lifting device, the combination with a reciprocable centerclip for engaging two printing plates, one on each side, of a liftingtoe pivoted to the center clip, a link pivoted in a fixed position atone end and pivotally connected with the lifting toe in such positionthat when the locking clip is in looking position the lifting toe issubstantially horizontal and the link in inclined position extendingfrom its pivotal connection with the toe toward the clip.

5. In a device of the character described, the combination with aprinting cylinder having a recess, of a reciprocable clip thereon forclamping two plates onopposlte sides of the clip, a pivot fixed withrespect to the cylind er, a link connected. with the pivot and e):-tcnding from 1t in a direction away from the clip, a lifting toe pivotedto the other end of the link and pivota ly connected with the clip andadapted to lie in the recess in the cylinder and spaced below theprinting plate when in looking position, whereby when the clip is drawnback the toe will be forced upwardly by its connection to release aplate.

6. 111 a device of the character described,

. the combination with a reciprocable clip for clamping'two plates onopposite sides thereof, a fixed pivot, a link connected with the pivotand extending from it ina direction away from the clip, a lifting toepivoted to the otherend of the link and pivotally connected with theclip and adapted to lie spaced below the printing plate when in lookingposition, whereby when the clip is forced forward the toe will be drawndown away from the plate before the clip engages the plate.

7. Thecombination with a press cylinder having inside and outside platesthereon, and means for simultaneously unclaniping an inside and anoutside plate, of means for automatically lifting the outer edge of theinside plate.

HENRY A. USE WOOD.

